/Engine/Plugins/Runtime/SmartObjects/Source/SmartObjectsModule/Public/SmartObjectSubsystem.h
whether the removal was successful
bool RemoveRuntimeInstanceFromSimulation ( const [FSmartObjectHandle](API\Plugins\SmartObjectsModule\FSmartObjectHandle) Handle, [USmartObjectComponent](API\Plugins\SmartObjectsModule\USmartObjectComponent) * SmartObjectComponent )